中国光学2022，Vol.15Issue(4)：835-844,10.DOI:10.37188/CO.EN.2022-0003
中红外波段AS2S3光子晶体光纤中受激布里渊散射的研究
Investigation of stimulated Brillouin scattering in As2S3 photonic crystal fibers at the mid-infrared waveband
摘要
Abstract
Stimulated Brillouin scattering in As2S3 photonic crystal fibers was investigated at wavelengths of 2 μm to 6 μm by the finite element method.The numerical results indicate that the proposed photonic crystal fiber can maintain single-mode operation when the air filling factor is less than 0.6.The Brillouin frequency shift is mainly influenced by the pump wavelength and fiber structure.The Brillouin frequency shift de-creases by 4.16 GHz when the pump wavelength is increased from 2 μm to 6 μm,while the Brillouin fre-quency shift changes by the order of megahertz when the rate of air filling increases from 0.5 to 0.6.The FWHM of the Brillouin gain spectrum depends on the phonon lifetime,and the FWHM of the Brillouin gain spectrum is nine times wider at a pump wavelength of 2 μm than that at a pump wavelength of 6 μm.The maximum Brillouin gain of the proposed fibers with air filling fractions of 0.5 and 0.6 are 2.413×10-10 m/W and 2.429×10-10 m/W,respectively.The Brillouin threshold is positively correlated with the pump wavelength for the same effective fiber length,and is 27.8％and 19.6％larger at a pump wavelength of 6 μm than that at 2 μm with air fill factors of 0.5 and 0.6,respectively.The numerical results are of great signific-ance for the design and fabrication of optical devices or optical sensors based on the proposed fibers in the mid-infrared band.关键词
受激布里渊散射/中红外/光子晶体光纤/光纤光学Key words
stimulated Brillouin scattering/mid-infrared/photonic crystal fiber/fiber optics分类
数理科学引用本文复制引用
孙慧杰,侯尚林,雷景丽..中红外波段AS2S3光子晶体光纤中受激布里渊散射的研究[J].中国光学,2022,15(4):835-844,10.基金项目
国家自然科学基金(No.61665005) （No.61665005）
兰州理工大学红柳一流学科发展计划资助项目Supported by National Natural Science Foundation of China(No.61665005) （No.61665005）
HongLiu First-class Disciplines Development Program of Lanzhou University of Technology （）
